28212750 has 48 divisors (see below), whose sum is σ = 76293360. Its totient is φ = 7522800.

The previous prime is 28212749. The next prime is 28212763. The reversal of 28212750 is 5721282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4020 + ... + 8519.

It is an arithmetic number, because the mean of its divisors is an integer number (1589445).

Almost surely, 2^28212750 is an apocalyptic number.

28212750 is an abundant number, since it is smaller than the sum of its proper divisors (48080610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28212750 is a wasteful number, since it uses less digits than its factorization.

28212750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12562 (or 12549 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 28212750 is about 5311.5675652297. The cubic root of 28212750 is about 304.4260459259.

The spelling of 28212750 in words is "twenty-eight million, two hundred twelve thousand, seven hundred fifty".